MainAxisPCA.h

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/*************************************************************************************
**
** Copyright 2007, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 

 
#pragma once
 
#include "../MLPointCloudUtilsSystem.h"
#include <mlVector3.h>
#include <mlMatrix3.h>
 
ML_START_NAMESPACE

class MLPOINTCLOUDUTILS_EXPORT MainAxisPCA
{
public:

  MainAxisPCA();

  virtual ~MainAxisPCA();

  void computeMainAxis(const std::vector<Vector3>& points);

  void getMainAxis(Vector3& longestAxis, Vector3& midAxis, Vector3& shortestAxis) const;
  void getExtension(float& longestExtent, float& midExtent, float& shortestExtent) const;

  Vector3 getLargestMainAxis() const;
  float getLargestExtension() const;

  Vector3 getCenterOfMass() const;
  Vector3 getMidPoint() const;
 
private:

  Vector3 _xAxis, _yAxis, _zAxis;
 
  Vector3 _centerOfMass, _midPoint;

  float _xDiameter, _yDiameter, _zDiameter;

  void sortByExtent();

  Matrix3 getCovarianceMatrix(const std::vector < Vector3 >& pointSet, const Vector3& meanVector);

  Vector3 calculateCenterOfMass(const std::vector < Vector3 >& pointSet);

  void getBoundingBox(const std::vector < Vector3 >& pointSet,
                      float& minX, float& maxX,
                      float& minY, float& maxY,
                      float& minZ, float& maxZ);
};
 
ML_END_NAMESPACE